EP0359130A2 - Doppler-Farb-Abbildungssystem mit linearer Wandleranordnung und mit lenkbarem Strahlenbündel - Google Patents

Doppler-Farb-Abbildungssystem mit linearer Wandleranordnung und mit lenkbarem Strahlenbündel Download PDF

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Publication number
EP0359130A2
EP0359130A2 EP89116551A EP89116551A EP0359130A2 EP 0359130 A2 EP0359130 A2 EP 0359130A2 EP 89116551 A EP89116551 A EP 89116551A EP 89116551 A EP89116551 A EP 89116551A EP 0359130 A2 EP0359130 A2 EP 0359130A2
Authority
EP
European Patent Office
Prior art keywords
doppler
image
mode
acoustic
organism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP89116551A
Other languages
English (en)
French (fr)
Other versions
EP0359130A3 (de
Inventor
Samuel H. Maslak
Donald J. Burch
John N. Wright
Hugh G. Larsen
Donald R. Langdon
Joel S. Chaffin
D. Grant Fash Iii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Medical Solutions USA Inc
Original Assignee
Acuson Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Acuson Corp filed Critical Acuson Corp
Publication of EP0359130A2 publication Critical patent/EP0359130A2/de
Publication of EP0359130A3 publication Critical patent/EP0359130A3/de
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
    • G01S7/52085—Details related to the ultrasound signal acquisition, e.g. scan sequences
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
    • G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
    • G01S15/8979—Combined Doppler and pulse-echo imaging systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
    • G01S7/52053—Display arrangements
    • G01S7/52057—Cathode ray tube displays
    • G01S7/52074—Composite displays, e.g. split-screen displays; Combination of multiple images or of images and alphanumeric tabular information

Definitions

  • This invention relates to a dual mode ultrasound imaging system which generates and simultaneously displays a two-­dimensional B-scan image of the organ or other portion of the human body being examined and a color Doppler image of blood flow information that is spatially coordinated with and superimposed upon that B-scan image.
  • B-mode images have been displayed along with separately displayed Doppler information acquired along a single line that may be oriented in a direction different from the scanning lines which generate the B-scan image.
  • Prior art U.S. patents 4,182,173; 4,217,909; 4,398,540; 4,318,413 and 4,141,347 are examples.
  • Sector scanned B-mode gray-scale image information and color-encoded Doppler data also have been simultaneously displayed where the Doppler information is acquired in multiple samples and multiple lines in the same direction as is the B-mode image information.
  • the invention provides a linear array of transducer elements and means to generate and transmit an acoustic imaging beam with characteristics optimized for B-mode imaging in one direction into the organism under examination.
  • Receive means process reflected acoustic imaging echos into amplitude detected and digitally converted image information which is stored for subsequent video display of a gray-scale encoded B-mode "parallel scanned" image.
  • the linear array of transducer elements in timed sequence generates and transmits separate steered acoustic Doppler beams at angles and with characteristics optimized for Doppler data acquisition which may be different from both the characteristics and direction of the B-mode acoustic imaging beam.
  • the Doppler-shifted echos from multiple "sample volumes" along the direction of each Doppler beam are received and processed into blood flow information, typically velocity, variance and power.
  • Selected blood flow information from multiple lines is then displayed as a color-encoded image that is superimposed on the B-mode image and is spatially coordinated and displayed simultaneously with it.
  • velocity and variance in combination or velocity alone is the blood flow information selected for color-encoding and display simultaneously with the B-mode image.
  • the present invention provides a dual mode ultrasound imaging system having an array of acoustic transducer elements and comprising B-mode imaging means to produce an electronically scanned acoustic image of an organism under examination, the B-mode image substantially representing the intensity of echos returned from the organism and comprising multiple B-mode scan lines; Doppler imaging means to produce an electronically scanned Doppler acoustic image of the organism, the Doppler image representing estimates of velocity or variance of moving scatterers derived from Doppler-shifted echos from the moving scatterers in the organism from multiple independent sample volumes along the direction of multiple Doppler scan lines forming the Doppler image with the Doppler scan lines directed at a preselected angle with respect to the B-mode scan lines; display means for displaying the B-mode image as a two-dimensional image on a color display with echo intensities encoded using a first mapping function of the red, green and blue components and for simultaneously displaying the Doppler image of estimates of velocity or variance of moving scatterers as a two-dimensional image using
  • the invention provides a dual mode ultrasound imaging system including a linear array of acoustic transducer elements; transmit means connected to each transducer element to generate and transmit a B-mode acoustic imaging beam in one direction into an organism under examination; receive means connected to each transducer element to receive acoustic imaging echos returned from the organism, to process the echos into an electrical signal and to combine signals from multiple transducer elements of the array into a summed and intensity-detected B-mode image signal representing an image of tissue interfaces and scatterers in the organism; frame memory means for storing the detected B-­mode image signals for each image line with origins for the image lines translated along the linear array; transmit means connected to each transducer element to generate and transmit an acoustic Doppler beam multiple times into the organism at a preselected angle with respect to the acoustic imaging beam; receive means connected to each transducer element to receive the acoustic Doppler-shifted echos from moving scatterers in the organism from multiple independent sample volumes
  • the present invention provides a two-dimensional Doppler ultrasound imaging system wherein multiple lines of Doppler information are acquired in interleaved fashion with each line propagated and received with a period T between acquisition with N independent lines of Doppler-shifted information collected within each period T.
  • Fig. 1 schematically illustrates a linear array of transducer elements 2A-2N which, when activated in one mode, propagate an acoustic imaging beam 3 usually in a direction perpendicular to the linear array 1, as shown.
  • the acoustic imaging beam shape and other characteristics are optimized for B-scan imaging.
  • the transducers in timed sequence propagate an acoustic Doppler beam 4 at a preselected angle with respect to the imaging beam that is optimized to obtain Doppler-shifted data from moving scatters such as the red blood corpuscles to form a color-encoded blood flow image superimposed on the B-scan image.
  • the Doppler beam characteristics are also optimized for Doppler data acquisition.
  • Fig. 2 illustrates a portion of a B-scan image of a blood vessel 5 with the image scan lines 6 propagated in a direction perpendicular to the transducer array 1 and to the blood vessel walls being examined.
  • the steered Doppler beams are propagated along multiple lines 7 at an angle to the imaging beam.
  • the direction of the Doppler beams are optimized for Doppler data acquisition from the moving scatterers in the blood flowing within the vessel 5.
  • the Doppler beam steering direction is indicated on the display screen by a parallelogram marker 8.
  • the Doppler and imaging beams are independent, each can be optimized for its particular function.
  • the B-mode acoustic imaging beam from each transducer element is usually narrow for high resolution purposes, usually perpendicular to the transducer array and may be at a higher frequency than the Doppler beam.
  • the Doppler beam can be steered independently to a more nearly optimum direction for data acquisition from the particular moving targets under examination, such as red blood cells.
  • the transmitted frequency of the Doppler beam may be lower to reduce attenuation effects at depth.
  • the pulse repetition rate will be linked to the velocity scale desired and may be different than for the B-mode image.
  • the Doppler beam may have a different number of transmitted pulses, different active transmit and receive apertures and different transmit and receive apodization than the B-mode beam.
  • the B-­ mode and Doppler image frame rates are faster than one new frame every five seconds.
  • the B-mode acoustic imaging beam 3 and acoustic Doppler beams 4 may be generated by the several transducer elements 2A-2N of the linear array 1, steered and timed in accord with the system shown in U.S. patent 4,550,607 issued to Samuel H. Maslak and John N. Wright on November 5, 1985 or U.S. patent 4,699,009 issued to Samuel H. Maslak and Hugh G. Larsen on October 13, 1987, for example.
  • Transmit pulses are supplied to transducers 2A-2N in the linear array 1 to produce the acoustic imaging beam 3 usually propagated perpendicularly to the array.
  • Imaging echos reflected from tissue interfaces and scatterers in the organism are received by transducers 2A-2N and in a separate receive channel for each transducer are processed, delayed and combined into an intermediate frequency signal at 10 in accord with the system illustrated in patent 4,550,607, shown schematically in functional block diagram 11.
  • the image signals are switched at 12 to a B-mode processing path, then amplitude detected at logarithmic amplifier 20 and amplitude detector 21, converted from analog to digital signals at digitizer 22 and stored in the B-mode frame memory 23 for subsequent display of an image of the organ or other part of the body being examined in a two-­dimensional gray-scale image on the video display monitor at 26.
  • the gray-scale image is formed by encoding the B-mode echo intensities using a first mapping function of the red, green and blue components.
  • Separate transmit pulses are supplied in timed sequence to the array for propagation of the acoustic Doppler beams 4 at a preselected angle relative to the acoustic imaging beam.
  • the transducers 2A-2N in timed sequence receive acoustic echos from the Doppler beams 4 reflected from moving scatterers such as the red cells in the bloodstream. They are processed through the same separate receive channels and summing delay line at 11 into an intermediate frequency signal at 10 which is switched at 12 into a color Doppler processing path.
  • the Doppler signals are converted from analog to digital signals at baseband converter 30 and digitizer 31.
  • Several Doppler information signals from each of multiple sample volumes along the direction of each Doppler beam are stored in Doppler multi-line storage memory 32.
  • the Doppler beam is propagated many times, usually 6 to 10 times, at each line.
  • the several stored Doppler information signals for each sample are passed through a high-pass filter 33 which eliminates the static B-mode information.
  • the mean velocity for each sample is determined in velocity estimator 34 and then stored in Doppler frame memory 35.
  • the velocity estimator will typically include fast Fourier transform or autocorrelation circuitry and, typically, will compute other blood flow parameters including variance and power, as well.
  • the stored information for each flow frame is then encoded with a color lookup table in color map 36 for the red, green and blue components.
  • the stored information may be encoded with various intensities of red related to blood flow velocity in one direction and various intensities of blue corresponding to blood flow velocity in the opposite direction.
  • the color output for multiple Doppler lines is combined in logic circuit 25 with the B-mode image signals that are gray-scale encoded at gray-scale map 24.
  • the color output is displayed on video display monitor 26 as a two-­dimensional color image superimposed on the gray-scale B-mode image to show blood flow direction and velocity within the blood vessel 5 of Fig. 2 in the two-dimensional area where the Doppler lines 7 intercept the vessel interior.
  • the acquisition of multiple lines of Doppler data may be time interleaved to utilize dead time in order to lower the color velocity scale (i.e. decrease the color Doppler repetition frequency) without lowering the frame rate.
  • the interleaving of Doppler lines is schematically illustrated in Fig. 4 where the array 1 is activated to propagate a first acoustic Doppler beam K at 40, followed by a second acoustic Doppler beam K + 1 at 41, followed by a third acoustic Doppler beam K + 2 at 42, etc., for N independently propagated acoustic Doppler beams.
  • the beams are propagated at the same angle to gather Doppler-shifted information from multiple sample volumes along the direction of each beam and over an extended area of the image as defined by the beams.
  • the Doppler lines could also be steered at an angle different than shown.
  • the activation sequence of transducer elements 2A-2N illustrated in Fig. 5 is such that each line 40,41,42, etc., is activated multiple times with a precisely generated period T between each firing of the same line with corresponding precise processing of the acoustic echos from that beam.
  • the 40,41,42...N independent lines of Doppler-shifted information are collected in sequence within each repetition of period T.
  • the independent acoustic Doppler lines are interleaved with the acquisition occurring precisely and periodically with a period of T seconds between acquisition on each line but with N divided by T acoustic lines propagated and processed per second where N is the number of independent acoustic lines.
  • several Doppler signals from each of the multiple sample volumes are stored for each line so that Doppler-shifted blood flow information can be obtained for each sample volume.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
EP89116551A 1988-09-13 1989-09-07 Doppler-Farb-Abbildungssystem mit linearer Wandleranordnung und mit lenkbarem Strahlenbündel Ceased EP0359130A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/243,820 US5014710A (en) 1988-09-13 1988-09-13 Steered linear color doppler imaging
US243820 1988-09-13

Publications (2)

Publication Number Publication Date
EP0359130A2 true EP0359130A2 (de) 1990-03-21
EP0359130A3 EP0359130A3 (de) 1990-08-16

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Family Applications (1)

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EP89116551A Ceased EP0359130A3 (de) 1988-09-13 1989-09-07 Doppler-Farb-Abbildungssystem mit linearer Wandleranordnung und mit lenkbarem Strahlenbündel

Country Status (5)

Country Link
US (1) US5014710A (de)
EP (1) EP0359130A3 (de)
JP (1) JPH02211136A (de)
AU (1) AU629236B2 (de)
CA (1) CA1327392C (de)

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EP0592967A2 (de) * 1992-10-16 1994-04-20 Acuson Corporation Verfahren und Vorrichtung zum Abbilden von Gewebe mittels Ultraschallwellen, mit Dopplerverarbeitung von Geschwindigkeit und Beschleunigung
EP0871043A3 (de) * 1997-04-08 1998-10-28 EndoSonics Corporation Verfahren und Vorrichtung zur Farbbilddarstellung einer Blutströmung über von einer intravaskularen Ultraschall-Bildsonde empfangene Ultraschall-Echosignale
EP0585070B1 (de) * 1992-08-21 1999-03-24 EASTMAN KODAK COMPANY (a New Jersey corporation) Verbesserung zur Unterscheidung bei der Organwandbewegung
EP0952462A2 (de) * 1998-04-23 1999-10-27 General Electric Company Verfahren und Anordnung zur Verbesserung der Anzeige von Biopsiekanülen in Ultraschall-Bilddarstelllung

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KR102107728B1 (ko) * 2013-04-03 2020-05-07 삼성메디슨 주식회사 휴대용 초음파 장치, 휴대용 초음파 시스템 및 초음파 진단 방법
JP7401459B2 (ja) 2018-01-23 2023-12-19 コーニンクレッカ フィリップス エヌ ヴェ 針挿入誘導を提供する超音波イメージングシステム

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EP0952462A2 (de) * 1998-04-23 1999-10-27 General Electric Company Verfahren und Anordnung zur Verbesserung der Anzeige von Biopsiekanülen in Ultraschall-Bilddarstelllung
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AU4024789A (en) 1990-03-22
JPH02211136A (ja) 1990-08-22
EP0359130A3 (de) 1990-08-16
AU629236B2 (en) 1992-10-01
US5014710A (en) 1991-05-14
CA1327392C (en) 1994-03-01

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